- #1

Weam Abou Hamdan

- 25

- 3

Let us imagine a solid

__imm__

__ersed in a liquid__in a container such that the density of the liquid is less than the density of the solid. This means that the solid must

__sink__. Let us study the solid when it reaches the bottom surface and is now

__at rest__. The forces acting on the solid when it is at the surface are its

**Weight (W)**, the

**Normal Force (N)**exerted by the bottom surface, and the

**Buoyant Force (F**exerted by the liquid. According to

_{B})*Newton's First Law of Motion*, since the solid is at

__equilibrium__, the sum of these forces must be zero.

W = F

_{B}+ N

Let us now study the same solid resting on the same bottom surface of the container such that there is

__no liquid__. The forces acting on the solid in this case are its

**Weight**and the

**Normal Force (N**exerted by the same surface. According to

_{2})*Newton's First Law of Motion*, since the solid is at

__equilibrium__, the sum of the forces must be zero.

W=N

_{2}

Apparently, the magnitude of the

**Normal Force**increased from the first case to the second case. What is the physical origin of such an increase?

Weam Abou Hamdan

Thursday, July 19, 2018